You want to consume messages from multiple topics and process them in order of arrival regardless of topic. Which Consumer API approach should you use?

hard📝 Application Q8 of 15

Kafka - Consumers

ASubscribe to all topics and poll regularly, processing records as they arrive

BAssign specific partitions manually and poll each separately

CCreate multiple consumers, one per topic, and merge results externally

DUse a producer to reorder messages before consumption

Step-by-Step Solution

Solution:

Step 1: Understand subscription for multiple topics
subscribe() can take multiple topics, allowing consumer to receive messages from all.
Step 2: Processing order
poll() returns records in order of arrival across subscribed topics, enabling ordered processing.
Final Answer:
Subscribe to all topics and poll regularly, processing records as they arrive -> Option A
Quick Check:
Subscribe multiple topics and poll for ordered processing [OK]

Quick Trick: Subscribe to multiple topics to get combined ordered messages [OK]

Common Mistakes:

Assigning partitions manually unnecessarily
Using multiple consumers complicates ordering
Using producer to reorder is incorrect

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More Kafka Quizzes

You want to consume messages from multiple topics and process them in order of arrival regardless of topic. Which Consumer API approach should you use?

Step 1: Understand subscription for multiple topics

Step 2: Processing order

Final Answer:

Quick Check:

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